Tag cloud presentation for NodeJS
npm install node-wordcloudbash
npm install node-wordcloud
`
Usage
`javascript
const { createCanvas } = require('canvas');
const WordCloud = require('node-wordcloud')();
const canvas = createCanvas(500, 500);
// Array of words [text: String, weight: Number][]
// The weight of word isn't the absolute size of word, the real size will be automatically calculated based on options.sizeRange
const list = [['word', 150], ['hello', 140], ['world', 130], ['test', 90]];
const wordcloud = WordCloud(canvas, { list });
// you should call draw() to draw the wordcloud manually
wordcloud.draw();
const buffer = canvas.toBuffer();
// you can use the wordcloud.updateList() to update the word list
// wordcloud.updateList([['word', 150], ['hello', 140], ['world', 130], ['test', 90]]);
// wordcloud.draw();
`
Example
See example folder for more examples.
Options
Support most of options of wordcloud2.js, except for:
- clearCanvas
- weightFactor
- wait
- minRotation
- maxRotation
- classes
- hover
- click
Also we added some options:
`diff
+ {
+ sizeRange: [16, 68],
+ rotationRange: [-70, 70],
+ }
`
API
We remove the support for generating word cloud in svg format, because some canvas implementation already allow to generate svg directly (such as node-canvas).
This module will not draw word cloud automatically, you need to call wordcloud.draw() to draw word cloud. See example for more details.
You can use wordcloud.updateList(list: Array<[text: String, weight: Number]>) to update word list. See example for more details.
In wordcloud2.js, you can import module by const WordCloud = require('wordcloud2'), but in node-wordcloud, it will be const WordCloud = require('node-wordcloud')(), you can choose the canvas implementation you want to use by passing createCanvas function, here here some examples:
`javascript
// use node-canvas default
const WordCloud = require('node-wordcloud')();
// use node-canvas
const { createCanvas } = require('canvas');
const WordCloud = require('node-wordcloud')(createCanvas);
// use skia-canvas
const { Canvas } = require('skia-canvas');
const WordCloud = require('node-wordcloud')((w, h) => new Canvas(w, h));
// etc.
``